Help to solve =IF(LINEST(Data!X:X)>0,"↑","↓") formula

Hi

I need help to find a formula in Cell AF7 on the Day sheet. The formula should find whether there is a upward or downward trend for the volume (F coloumn in Data sheet) in the first hour on day 3. Where day 3 starts, can be seen as the third a in the A Column in the Data sheet. The thing is that the row position on the data on the Data sheet varies, so a helper sheet is created. The formula in AC7 finds the highest value within the first hour, so I tried to combine this formula with the trend formula as you can see in AF7, however this doesn't work.
The post for the other formulas can be found here: https://www.excelforum.com/excel-for...formula-4.html